1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
#ifndef _XT_HASHLIMIT_H
#define _XT_HASHLIMIT_H
#include <linux/types.h>
/* timings are in milliseconds. */
#define XT_HASHLIMIT_SCALE 10000
#define XT_HASHLIMIT_SCALE_v2 1000000llu
/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490
* seconds, or one packet every 59 hours.
*/
/* packet length accounting is done in 16-byte steps */
#define XT_HASHLIMIT_BYTE_SHIFT 4
/* details of this structure hidden by the implementation */
struct xt_hashlimit_htable;
enum {
XT_HASHLIMIT_HASH_DIP = 1 << 0,
XT_HASHLIMIT_HASH_DPT = 1 << 1,
XT_HASHLIMIT_HASH_SIP = 1 << 2,
XT_HASHLIMIT_HASH_SPT = 1 << 3,
XT_HASHLIMIT_INVERT = 1 << 4,
XT_HASHLIMIT_BYTES = 1 << 5,
XT_HASHLIMIT_RATE_MATCH = 1 << 6,
};
struct hashlimit_cfg {
__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
__u32 avg; /* Average secs between packets * scale */
__u32 burst; /* Period multiplier for upper limit. */
/* user specified */
__u32 size; /* how many buckets */
__u32 max; /* max number of entries */
__u32 gc_interval; /* gc interval */
__u32 expire; /* when do entries expire? */
};
struct xt_hashlimit_info {
char name [IFNAMSIZ]; /* name */
struct hashlimit_cfg cfg;
/* Used internally by the kernel */
struct xt_hashlimit_htable *hinfo;
union {
void *ptr;
struct xt_hashlimit_info *master;
} u;
};
struct hashlimit_cfg1 {
__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
__u32 avg; /* Average secs between packets * scale */
__u32 burst; /* Period multiplier for upper limit. */
/* user specified */
__u32 size; /* how many buckets */
__u32 max; /* max number of entries */
__u32 gc_interval; /* gc interval */
__u32 expire; /* when do entries expire? */
__u8 srcmask, dstmask;
};
struct hashlimit_cfg2 {
__u64 avg; /* Average secs between packets * scale */
__u64 burst; /* Period multiplier for upper limit. */
__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
/* user specified */
__u32 size; /* how many buckets */
__u32 max; /* max number of entries */
__u32 gc_interval; /* gc interval */
__u32 expire; /* when do entries expire? */
__u8 srcmask, dstmask;
};
struct hashlimit_cfg3 {
__u64 avg; /* Average secs between packets * scale */
__u64 burst; /* Period multiplier for upper limit. */
__u32 mode; /* bitmask of XT_HASHLIMIT_HASH_* */
/* user specified */
__u32 size; /* how many buckets */
__u32 max; /* max number of entries */
__u32 gc_interval; /* gc interval */
__u32 expire; /* when do entries expire? */
__u32 interval; /* in seconds*/
__u8 srcmask, dstmask;
};
struct xt_hashlimit_mtinfo1 {
char name[IFNAMSIZ];
struct hashlimit_cfg1 cfg;
/* Used internally by the kernel */
struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
};
struct xt_hashlimit_mtinfo2 {
char name[NAME_MAX];
struct hashlimit_cfg2 cfg;
/* Used internally by the kernel */
struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
};
struct xt_hashlimit_mtinfo3 {
char name[NAME_MAX];
struct hashlimit_cfg3 cfg;
/* Used internally by the kernel */
struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
};
#endif /*_XT_HASHLIMIT_H*/
|
